i will answer in order u posted:

standard motor products or bosch
felpro is fine
gates, dayco, or oem
anco or trico
carter or bosch
wix
feders you can get from a body company, a salvage yard, or oem
your going to wind up taking the airfilter and measuring dimensions to find a match...k&n for brand


just remember....there is no such thing as oem...someone(bosch, federal mogul...whoever) is making the parts for them and putting the automakers logos and part numbers on them.